[eric] browser: merge-verify, a confirmed send is the proof, no separate verify turn + trailing-read telemetry

backend/apps/agents/browser/browser_agent.py

@@ -1753,9 +1753,21 @@ async def run_browser_agent(
             f"auto_scans={auto_scan_count} hint_steps={len(route_hint_keys)}"
         )
         _nt = turn + 1
+        # merge-verify telemetry: read-only tool calls AFTER the last state-changing
+        # action are the redundant trailing "let me re-verify" turns the prompt now
+        # folds into the OUTCOME line; this should trend to 0 on the confirmed path.
+        _act_tools = {"BrowserType", "BrowserClickIndex", "BrowserClick", "BrowserClickByName",
+                      "BrowserPressKey", "BrowserScroll", "BrowserBatch", "BrowserNavigate"}
+        _read_tools = {"BrowserScreenshot", "BrowserGetText", "BrowserGetElements",
+                       "BrowserListInteractives", "BrowserExtract"}
+        _last_act = max((i for i, a in enumerate(action_log)
+                         if a.get("tool") in _act_tools and a.get("ok")), default=-1)
+        _trailing_reads = sum(1 for a in action_log[_last_act + 1:]
+                              if a.get("tool") in _read_tools) if _last_act >= 0 else 0
         logger.info(
             f"[browser-output {session_id}] out_tokens={out_tokens_total} "
-            f"mean_out_per_turn={out_tokens_total // max(1, _nt)} narration_turns={narration_turns}/{_nt}"
+            f"mean_out_per_turn={out_tokens_total // max(1, _nt)} narration_turns={narration_turns}/{_nt} "
+            f"trailing_reads={_trailing_reads}"
         )
         browser_metrics.record_task(session_id, browser_id, task, final_status,
                                     metrics_started_at, turn + 1, action_log, session.tokens,

backend/apps/agents/browser/browser_schema.py

@@ -641,7 +641,12 @@ SYSTEM_PROMPT = (
     "first make sure the goal isn't already done (e.g. your message isn't already the "
     "last one in the thread), pass `expect` set to proof it landed, and NEVER fire it a "
     "second time unless you have verified the first did NOT go through. This is how you "
-    "avoid both ghost-successes and double-sends.\n\n"
+    "avoid both ghost-successes and double-sends.\n"
+    "When that `expect` CONFIRMS (the result says 'Confirmed: ...'), that IS your "
+    "verification: go STRAIGHT to your final OUTCOME line and cite it. Do NOT spend an "
+    "extra screenshot or read turn to re-check what the confirmation already proved, that "
+    "is a wasted round-trip. Only take a separate verification step when `expect` came "
+    "back 'NOT confirmed' or you forgot to pass one.\n\n"
 
     "## Loop awareness\n"
     "If you see a tool result containing 'LOOP DETECTED' or '⚠️', it means you "